Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones the agency reported to the FBI, through 2025. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 23, 2026 and September 25, 2026.
Tinley Park, Illinois, in Cook County, has about 55,000 residents (2024 Census Bureau estimate), and its arrests are reported to the FBI by an agency of its own. An arrest in the city leaves the same records whoever makes it: the arresting agency's report, the record of anyone held at the county jail, and, if the State's Attorney files charges, a case in the Circuit Court of Cook County. This guide says who keeps each one, what it costs and who may see it, with the arrest counts the agency reported.
This guide covers who makes arrests, how many arrests, booking and the jail, finding an arrest, copies and common questions.
Related guides: Tinley Park public records, Cook County arrest records, Illinois arrest records and Illinois inmate search.
Who Makes Arrests in Tinley Park
The FBI lists Tinley Park with an arrest reporting agency of its own, filed as Tinley Park Police Department. It reported 768 arrests for 2025. A city is listed separately whether the officers are the city's own or the sheriff's under contract; the FBI's list does not say which.
Outside the city, the Cook County Sheriff's Office is the county agency. It reported 3,038 arrests for 2025.
The FBI's agency list also places these agencies in Cook County: the University of Illinois at Chicago, Chicago State University, Northeastern Illinois University, Oakton Community College and ten more (campus police); Canadian Pacific Railway, the Metra Police Department, the Chicago Heights Park District, Chicago Fire Department Arson Investigations and 11 more (other).
How Many Arrests Tinley Park Reports
The FBI publishes every agency's monthly arrest counts on the Crime Data Explorer. These are the full-year totals, all offenses, as the FBI held them on October 8, 2026; a year with months missing or not reported is left out.
- Tinley Park: 768 for 2025, 766 for 2024, 807 for 2023, 704 for 2022 and 566 for 2021.
Tinley Park's 768 arrests in 2025 were up 0.3 percent from 766 in 2024.
Through August 2026, Tinley Park reported 464 arrests, against 496 in the same months of 2025.
Across Cook County, the 100 agencies with all twelve months of 2025 on file reported 71,187 arrests between them.
Booking: Where People Arrested in Tinley Park Are Held
A person kept in custody after an arrest in Tinley Park is held at the county jail, whichever agency made the arrest, apart from the short stay some city departments' own holding cells allow; a person cited and released at the scene is not booked at all. The jail's record of each person held, with the charges, is a public record of the arrest, and the court file takes over from there.
On an average day in 2024 the jail held about 4,790 people, down from about 5,770 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 7,084 beds, and it ran at 73 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
SearchSystems opened and checked the custody page of the Cook County Sheriff's Office at cookcountyil.gov/service/locate-inmate (page title: Locate an Inmate), which answered when SearchSystems opened it on September 23, 2026.
That page is the place to look for someone who was booked recently; a person cited and released at the scene, or held only a few hours by a city department, will not be on it.
A person sentenced to prison serves the sentence in a facility of the Illinois Department of Corrections, whose inmate locator is at idoc.illinois.gov/offender/inmatesearch.html.
How to Find Out About an Arrest in Tinley Park
An arrest in Tinley Park can be traced in three places, depending on where the case stands: the custody page of the Cook County Sheriff's Office described above, for anyone booked into the county jail; the case index of the Circuit Court of Cook County, which shows whether charges were filed and the next court date (the court records page SearchSystems verified is at cookcountyil.gov/service/court-records-and-archives); the State's Attorney, which decides whether an arrest becomes a charge (its page is at cookcountyil.gov/agency/states-attorney, phone (312) 603-1880).
Illinois is one of the states that lets anyone look up another person's statewide criminal history: conviction information is public under the Uniform Conviction Information Act, through the Illinois State Police. That record shows what agencies reported to the state, which is wider than one county's court index but can lag it.
Getting a Copy of an Arrest Record in Tinley Park
An arrest report belongs to the agency whose officer wrote it, and that agency releases it, not the court or the jail. Under the Illinois Freedom of Information Act the agency must answer within 5 business days, with one 5-day extension, and it may charge copying only after the first 50 pages.
- An arrest by the Tinley Park police: the police records page SearchSystems verified at tinleypark.org/government/departments/police_department/sections/re... (page title: Records), phone (708) 444-5368, Monday, Wednesday, Thursday and Friday; 8:30 a.m. to 7:30 p.m., which answered when SearchSystems opened it on September 25, 2026.
- An arrest by the Cook County Sheriff's Office: ask its records unit.
- A defendant who has been charged gets the report through the case: the State's Attorney, (312) 603-1880, handles discovery for pending cases.
- The court file of a case that was filed: the Circuit Court of Cook County, through the court records page at cookcountyil.gov.
- Your own statewide record: a name-based or fingerprint-based request to the Illinois State Police.
The Cook County guide covers every agency in the county: Cook County arrest records.
Frequently Asked Questions
How many arrests are made in Tinley Park each year?
Tinley Park reported 768 arrests to the FBI for 2025, its latest full year.
How do I find out if someone is in jail in Tinley Park?
Look on the custody page of the Cook County Sheriff's Office at cookcountyil.gov/service/locate-inmate. It covers people booked into the county jail.
Where are people arrested in Tinley Park booked?
Those kept in custody go to the county jail, run by the Cook County Sheriff's Office; a person cited and released at the scene is not booked.
Are arrest records public in Tinley Park?
The court files of criminal cases are public, and so is the statewide criminal history kept by the Illinois State Police: conviction information is public under the Uniform Conviction Information Act. The arrest report itself is released by the agency that made the arrest, under the Illinois Freedom of Information Act.
How do I get a copy of an arrest report in Tinley Park?
From the agency that made the arrest: the Tinley Park police for its own arrests, the Cook County Sheriff's Office for the sheriff's. Under the Illinois Freedom of Information Act the answer is due within 5 business days, with one 5-day extension.
Is this the official Tinley Park website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.